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(No Model.) 3 Sheets-Sheet 1.

J. W. PROVAN. TRIP SLING 5 No. 551,836. Patented Dec. 24, 1895.

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Wi (7! e33 ANDREW i! GRAN '(No Model.) '3 Sheets-Sheet 2.

J. W. PROVAN.

TRIP SLING.

No. 551,836. Patented Dec. 24, 1895.

WiOtQSS e3 ifl e71 (or (N Model.) 3 Sheets-Sheet a.

J. .W. PROVAN.

TRIP SLING.

No. 551,836. Patented B60 24, 1895.

AN DREW H.0RAMM. PHMO-IJTIIQWASHINGTOMA C UNITED STATES PATENT OFFIcE.

JAMES \V. PROVAN, OF OSHAIVA, CANADA.

TRIP-SLING.

SPECIFICATION forming part of Letters Patent No. 551,836, dated December 24;, 1895.

Application filed March 11, 1895. Serial No. 541,281. (No model.)

T0 at whom it may concern:

Be it known that I, J AMES WHITE PROVAN, manufacturer,residing in the town of Oshawa, in the county of Ontario and Province of Ontario, Canada, have invented a certain new and Improved Trip-Sling, of which the following is a specification.

The object of the invention is to provide a tripping device for carrying and dumping hay, grain sheaves, or other produce, and comprising two or more slings, each of which may be automatically and simultaneously tripped at the center, as specified, and in which device the several ropes comprising the slings may be spread out on the load to the desired width as they approach the center, thereby affording greater lifting capacity while retaining the principle of the center trip and by means of which the cross-slats usually employed in slings of this nature may be dispensed with, and in which each sling is suitably supported at each end and islformed in two parts detachably connected together, and is in combination with a trip-line connected to one of the points of support and adapted to break the connection between the two parts, when the weight of the load is transferred from one of the parts of the sling to the adjacent trip-line, substantially as hereinafter described.

Figure 1 is a perspective view of my tripsling, partly broken away, and its connections in the act of raising a load from the wagon. Fig. 2 is a perspective view of my trip-sling, partly broken away, in the act ofdumping the load onthe mow. Fig. 3 is a perspective view of a plurality of slings disconnected from their pulley-blocks.

Like letters of reference indicate similar parts in the different figures.

In Fig-1A A are pulley-blocks which have been lowered so as to be over the ends of the wagon. V

B is the hoisting-rope for hoisting the load to the carrier by which it is conveyed to the part of the mow where it is to be dumped.

ct is an eye formed on the pulley-block A, through which passes the tripping-cord O to its connection through the hole d with the pivoted catch D. This pivoted catch. D is pivoted at d to the bracket F, which is connected to the pulley-block.

d is a catch-hole formed in the pivoted catch D with which the lug or teat e on the pivoted trigger E engages when the trigger is locked. V This trigger E is pivoted at e to the bottom of the bracket F.

f is a spring which keeps the catch D down on the lug formed on the end of the trigger when the trigger is locked. By pulling on the tripping-cord O the pivoted catch D is raised against the power of the spring f from its seat on the end of the trigger E.

G is a hook formed on one end of this pivoted trigger, on which the loop M (hereinafter referred to) is hung, and g is a keeper to pre vent this loop from becoming displaced from the hook when the sling is operated. This hook G, instead of being on the trigger, may be on the bracket or pulley-block.

I I are connecting-rings connected respectively with the trigger E and the hook II when the load is being lifted, as shown in Fig. 1. These connecting-rings comprise suspendingholes J by which the connecting-rings are attached to the trigger E and hook H, respectively, and K are sling-holes, preferably three in number, to which the ends of the slings are attached.

L are loop-holes through which the loop M is passed and then placed over the hook G, formed on the end of the pivoted trigger E.

O is a trip-line which is connected at one end to the loop M, and at its other end to the trip-hook P, as indicated. The several triplines used are all fastened to this loop M.

N N are two parts of which the sling is composed, the part N being connected at one end to the trip-hook P and at the other to one of the sling-holes K in the connectingring I. The part N of the sling is connected to the ring q formed on the eye Q, which engages with the trip-hook P before the triphook has been tripped, and the other end is connected to the connecting-ring I.

It will be seen that while the load is being carried by the sling, as shown in Fig. 1, the weight of the load is borne by the parts N N of the sling, and that the trip-line O is comparatively slack, and that the trip-line is connected with the trip-hook P at the hole p, which is farther away from the point of support on the connecting-ring I than is the end of the part N of the sling which is connected to the trip-hook by means of the hole q, and that the seat for the eye 9* is centrally located between the holes 19 and q, the hole 1) being farther from the point of support than the hole q.

\Vhen the load is being dumped, it will be seen by Fig. 2 that the weight of the load is transferred from the part N of. the sling to the trip-line O, by reason of the fact that on pulling the tripping-cord C the pivoted catch D is raised so as to allow the pivoted trigger E to release the connecting-ring I, the con necting-ring I falling into the position shown in Fig. 2 and being held up merely by means of the loop M, which has been passed over the hook G on the other end of the trigger. The

part N of the sling which has thus been tripped becomes loose and the weight falls onto the trip line 0, thus causing the triphook P to turn on the seat 1 as a center and be canted over into the position shown in Fig. 2, so that the eye Q becomes at once disengaged from the hook P, and the load is dumped on the portion of the mow selected immediately beneath the sling.

In Fig. 2 it will bc-seen that the hoistingrope-B has been pulled on, and the pulleyblocks A A are brought together in position for being hooked onto the carrier by means of the bail on top of the pulley-block for the purpose of being carried to the place in the mow where the hay is to be dumped. These slings, which are preferably made of two equal parts, are preferably three in number, although two might suffice for the purpose of lifting a load. The parts being hooked together by the trip-hook P and eye Qthe sling is laid under suchlayers of load in the wagon as may be desired, and on being carried to the barn the ends are connected respectively by means of the connecting-rings II to the hook H and the pivoted triggerE, which is locked to the pivoted catch D, and the loop M is placed in position on the hook G, as indicated in Fig. 1. Thesling is then in position to do itswork, as already indicated.

The relative lengths of the trip-line O and of the adjoining parts N of the sling can be readily adjusted, as well as the length of loop M, which it is necessary to have in order to secure the proper amount of slackness for the part N and of tautness for the trip-line 0 when the trigger is tripped and the load dumped.

In Fig. 2 theload is just about leaving the sling, the parts having been just disconnected and the load is being dumped immediately below the sling. Of course the parts N and N will hang vertically from their respective hooks when clear of the load.

By my invention I have been able to dispense with the cross-slats which are usually employed in slings of this description and which necessarily are short so as to fit into the wagon-box, thus decreasing the capacity of the sling for raising loads.

By my device I am able to raise a larger load and to more readily dump it thanis usual, my device being readily made to employ a small space and being both cheap and effective in operation and adapted to any size of wagon that may be employed inhaulin g the produce.

When three slings are employed, the central sling of the three may preferably be slightly longer than the outer ones, but as a matter of length of parts can be readily ascertained and adjusted no specificidirections are necessary.

Although I have shown the specific form of trip hook and eye for connecting the two parts of the sling together, I do not wish to confine myself to this special form, but any other form of connection which may be disconnected by means of transferring the weight of the load from the sling to. the trip-line is within the scope of my invention. It will also be noticed that when the connecting-ring I is released from the trigger E, as shown in Fig. 2, the weight is thrown onto the several triplines employed and which are tied to the loop M, so that the part N of each sling which has an appropriate trip-line is disengaged from the part N and the several slings which carry the load are automatically and simultaneously tripped at the centerimmediately after releasing the connecting-ring I: from the trigger E by pulling on the tripping-cord C.

I am aware of the United States Patent of Louden, No. 541,281, and do not attempt to claim anything therein, as I-regard my invention as essentially different therefrom and much superior thereto, inasmuch as my peculiar and novel construction enables meto connect a plurality of slings to the connectingrings, whereby they can all be successfully and simultaneously tripped by the opera-tion. of a single tripping-cord which releases said connecting-ring, throwing the loads on said plurality of slings and thus simultaneously uneouples them and drops the load.

What I claim as my invention is- 1. In a device of the class described, asling suitably supported at each end and formed in two parts, means for detachably connecting said two parts together, a trip-line as 0 connected with said detachable connecting mean s and with one of the supports ofthe sling, and a tripping device, connected with one of the parts of the sling and arranged when tripped to throw the weight of the loadfrom the sling to the trip-line, substantially as-described.

2. A device of the class described comprising pulley blocks, a sling normally supporting the load and formed in two parts, a trip hook and eye detachably connecting said two parts together, a supplemental line as 0 connected with saidtrip hook, a double hook intel-posed between one of said pulley blocks and the sling and line 0, and mechanism for tripping said hook to shift the load from said sling to said line 0, thereby disengaging the trip hook and eye and making the dump, sub stantially as described.

3. A trip-slin g eomprisin g a pulley block, a

main trip-sling formed of two parts as N N arranged to normally support the load, trip hook P and eye Q detachably connecting said parts N N together, supplemental trip line 0 suitably connected with the hook P, said part 0 and one of the parts N N having a connection with the pulley block, and mechanism arranged to shift the load from the part N to the supplemental trip line 0, substantially as described.

4:. In a device of the character described, the combination of a pulley block A, a pivoted catch D provided with a catch-hole (1 a pivoted trigger E forming a double hook and having a lug on one of said hooks engaging with said catch-hole d a tripping cord 0 connected with said pivoted catch D, a sling rope N having a connection with the hook engaging with the catch D, and a trip line 0 having a connection with the other of said hooks, whereby when the pivoted catch D releases the trigger upon the operation of the tripping cord, the weight of the load will be transferred from the sling rope N to the trip line 0, substantially as described.

5. In a device of the character described, the combination of the pulley blocks A, A, the pivoted trigger supported from block A and having two hooks thereon, means for normally holding said trigger in a normal position and adapted to be released, connecting rings I, I, one of which is'supported from the upper hook and the other by the opposite pulley block, sling ropes N, N supported from said rings-I, I, trip hook P and eye Q connecting said ropes N, N, and a trip line 0 forming a connection between the lower hook of the trigger E-and said hook P, whereby the hook P and eye Q are disconnected when the trigger E is released through the weight of the load on the trip line 0, substantially as described.

6. I11 a device of the class specified, the

combination of the pulley blocks A, A, the hoisting rope B, the eye a, tripping cord 0, the pivoted catch D, provided with the hole d and catch hole d the pivoted trigger E, provided with lug e, the bracket F, spring f, hook Gr, keeper 9, hook H, connecting rings I, I, provided with suspending holes J, sling holes K, and loop holes L, the loop M, the sling comprising parts N, N; the trip line 0, the trip hook P, provided with holes 13 and q and eye seat 0", the eye Q, provided with ring g, substantially as described and specified.

7. In a device of the class specified, a plurality of slings each of which is suitably supported at each end and formed in two parts, means for detachably connecting said two parts together, a trip-line as O for each of said slings, said trip-line being connected with said detachable connecting means and with one of the supports of the sling, and a tripping device connected with said plurality of slings and arranged when tripped to throw the weight of the load from the plurality of slings to the plurality of trip-lines, substantially as described.

8. In a device of the class specified, a plurality of slings normally supporting the load and each formed in two parts, means for detachably connecting said two parts together, a plurality of trip lines as 0 connected with the detachable connecting devices, pivoted double hook E having the plurality of slings connected with one of its hooks and the plurality of trip lines connected with its other hook, and tripping mechanism arranged when tripped to tilt said hooksand shift the load from the plurality of slings to the plurality of trip lines, substantially as described.

Toronto, March 4:, 1895.

JAMES W. PROVAN.

In presence of= A. M. NEFF, FRED CLARKE. 

